1 /*- 2 * Copyright (c) 2011 Adrian Chadd, Xenion Lty Ltd 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 15 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 16 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 17 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 18 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 19 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 20 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 21 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 23 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 24 */ 25 26 #include <sys/cdefs.h> 27 #ifdef __FreeBSD__ 28 __FBSDID("$FreeBSD$"); 29 #endif 30 31 /* 32 * net80211 fast-logging support, primarily for debugging. 33 * 34 * This implements a single debugging queue which includes 35 * per-device enumeration where needed. 36 */ 37 38 #include "opt_wlan.h" 39 40 #include <sys/param.h> 41 #include <sys/systm.h> 42 #include <sys/mbuf.h> 43 #include <sys/malloc.h> 44 #include <sys/endian.h> 45 #include <sys/kernel.h> 46 #include <sys/sysctl.h> 47 #include <sys/pcpu.h> 48 #include <sys/proc.h> 49 #include <sys/ucred.h> 50 #include <sys/alq.h> 51 52 #include <sys/socket.h> 53 54 #include <net/if.h> 55 #include <net/if_var.h> 56 #include <net/if_media.h> 57 #include <net/ethernet.h> 58 59 #include <netproto/802_11/ieee80211_var.h> 60 #include <netproto/802_11/ieee80211_freebsd.h> 61 #include <netproto/802_11/ieee80211_alq.h> 62 63 static struct alq *ieee80211_alq; 64 static int ieee80211_alq_lost; 65 static int ieee80211_alq_logged; 66 static char ieee80211_alq_logfile[MAXPATHLEN] = "/tmp/net80211.log"; 67 static unsigned int ieee80211_alq_qsize = 64*1024; 68 69 static int 70 ieee80211_alq_setlogging(int enable) 71 { 72 int error; 73 74 if (enable) { 75 if (ieee80211_alq) 76 alq_close(ieee80211_alq); 77 78 error = alq_open(&ieee80211_alq, 79 ieee80211_alq_logfile, 80 curthread->td_ucred, 81 ALQ_DEFAULT_CMODE, 82 sizeof (struct ieee80211_alq_rec), 83 ieee80211_alq_qsize); 84 ieee80211_alq_lost = 0; 85 ieee80211_alq_logged = 0; 86 kprintf("net80211: logging to %s enabled; " 87 "struct size %d bytes\n", 88 ieee80211_alq_logfile, 89 sizeof(struct ieee80211_alq_rec)); 90 } else { 91 if (ieee80211_alq) 92 alq_close(ieee80211_alq); 93 ieee80211_alq = NULL; 94 kprintf("net80211: logging disabled\n"); 95 error = 0; 96 } 97 return (error); 98 } 99 100 static int 101 sysctl_ieee80211_alq_log(SYSCTL_HANDLER_ARGS) 102 { 103 int error, enable; 104 105 enable = (ieee80211_alq != NULL); 106 error = sysctl_handle_int(oidp, &enable, 0, req); 107 if (error || !req->newptr) 108 return (error); 109 else 110 return (ieee80211_alq_setlogging(enable)); 111 } 112 113 SYSCTL_PROC(_net_wlan, OID_AUTO, alq, CTLTYPE_INT|CTLFLAG_RW, 114 0, 0, sysctl_ieee80211_alq_log, "I", "Enable net80211 alq logging"); 115 SYSCTL_INT(_net_wlan, OID_AUTO, alq_size, CTLFLAG_RW, 116 &ieee80211_alq_qsize, 0, "In-memory log size (#records)"); 117 SYSCTL_INT(_net_wlan, OID_AUTO, alq_lost, CTLFLAG_RW, 118 &ieee80211_alq_lost, 0, "Debugging operations not logged"); 119 SYSCTL_INT(_net_wlan, OID_AUTO, alq_logged, CTLFLAG_RW, 120 &ieee80211_alq_logged, 0, "Debugging operations logged"); 121 122 static struct ale * 123 ieee80211_alq_get(void) 124 { 125 struct ale *ale; 126 127 ale = alq_get(ieee80211_alq, ALQ_NOWAIT); 128 if (!ale) 129 ieee80211_alq_lost++; 130 else 131 ieee80211_alq_logged++; 132 return ale; 133 } 134 135 void 136 ieee80211_alq_log(struct ieee80211vap *vap, uint8_t op, u_char *p, int l) 137 { 138 struct ale *ale; 139 struct ieee80211_alq_rec *r; 140 141 if (ieee80211_alq == NULL) 142 return; 143 144 ale = ieee80211_alq_get(); 145 if (! ale) 146 return; 147 148 r = (struct ieee80211_alq_rec *) ale->ae_data; 149 r->r_timestamp = htonl(ticks); 150 r->r_version = 1; 151 r->r_wlan = htons(vap->iv_ifp->if_dunit); 152 r->r_op = op; 153 r->r_threadid = htonl((uint32_t) curthread->td_tid); 154 memcpy(&r->r_payload, p, MIN(l, sizeof(r->r_payload))); 155 alq_post(ieee80211_alq, ale); 156 } 157